When taking a photo of a nearby flower, your camera lens should be set
A) closer than one focal length from the photosensitive surface.
B) farther than one focal length from the photosensitive surface.
C) to one focal length from the photosensitive surface.
Answer: B
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In a double-slit experiment, the distance between the slits is 0.2 mm, and the distance to the screen is 150 cm. What wavelength (in nm) is needed to have the intensity at a point 1 mm from the central maximum on the screen be 80% of the maximum intensity?
A. 900 B. 700 C. 500 D. 300 E. 600
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The eccentricity of a perfectly circular orbit is 1
Indicate whether the statement is true or false
As a system loses its ability to do useful work
A) energy increases. B) entropy decreases. C) energy decreases. D) entropy increases. E) entropy remains constant.